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267 lines
8.6 KiB
Plaintext
267 lines
8.6 KiB
Plaintext
/** \ingroup core
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* A composer class that displays svg files or raster format (jpg, png, ...)
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* */
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class QgsComposerPicture: QgsComposerItem
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{
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%TypeHeaderCode
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#include "qgscomposerpicture.h"
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%End
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public:
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/** Controls how pictures are scaled within the item's frame
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*/
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enum ResizeMode
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{
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Zoom, /*!< enlarges image to fit frame while maintaining aspect ratio of picture */
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Stretch, /*!< stretches image to fit frame, ignores aspect ratio */
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Clip, /*!< draws image at original size and clips any portion which falls outside frame */
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ZoomResizeFrame, /*!< enlarges image to fit frame, then resizes frame to fit resultant image */
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FrameToImageSize /*!< sets size of frame to match original size of image without scaling */
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};
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/** Format of source image
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*/
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enum Mode
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{
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SVG,
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RASTER,
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Unknown
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};
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//! Method for syncing rotation to a map's North direction
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enum NorthMode
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{
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GridNorth, /*!< Align to grid north */
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TrueNorth, /*!< Align to true north */
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};
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QgsComposerPicture( QgsComposition *composition /TransferThis/);
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~QgsComposerPicture();
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/** Return correct graphics item type. */
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virtual int type() const;
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/** Reimplementation of QCanvasItem::paint*/
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void paint( QPainter *painter, const QStyleOptionGraphicsItem *itemStyle, QWidget *pWidget );
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/** Sets the source path of the image (may be svg or a raster format). Data defined
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* picture source may override this value. The path can either be a local path
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* or a remote (http) path.
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* @param path path for the source image
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* @see usePictureExpression
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* @see picturePath
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* @note added in QGIS 2.5
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*/
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void setPicturePath( const QString &path );
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/** Returns the path of the source image. Data defined picture source may override
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* this value. The path can either be a local path or a remote (http) path.
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* @returns path for the source image
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* @see usePictureExpression
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* @see setPicturePath
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* @note added in QGIS 2.5
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*/
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QString picturePath() const;
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/** Sets this items bound in scene coordinates such that 1 item size units
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* corresponds to 1 scene size unit and resizes the svg symbol / image
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*/
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void setSceneRect( const QRectF &rectangle );
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/** Stores state in Dom element
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* @param elem is Dom element corresponding to 'Composer' tag
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* @param doc is Dom document
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*/
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bool writeXml( QDomElement &elem, QDomDocument &doc ) const;
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/** Sets state from Dom document
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* @param itemElem is Dom node corresponding to item tag
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* @param doc is Dom document
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*/
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bool readXml( const QDomElement &itemElem, const QDomDocument &doc );
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/** Returns the rotation used for drawing the picture within the item's frame
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* @returns picture rotation in degrees
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* @note added in 2.2
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* @see setPictureRotation
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* @see rotationMap
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*/
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double pictureRotation() const;
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/** Sets the map object for rotation (by id). A value of -1 disables the map
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* rotation. If this is set then the picture will be rotated by the same
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* amount as the specified map object. This is useful especially for
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* syncing north arrows with a map item.
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* @param composerMapId composer map id to sync rotation with
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* @see setPictureRotation
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* @see rotationMap
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*/
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void setRotationMap( int composerMapId );
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/** Returns the id of the rotation map. A value of -1 means map rotation is
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* disabled. If this is set then the picture is rotated by the same amount
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* as the specified map object.
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* @returns id of map object
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* @see setRotationMap
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* @see useRotationMap
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*/
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int rotationMap() const;
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/** True if the picture rotation is matched to a map item.
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* @returns true if rotation map is in use
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* @see rotationMap
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* @see setRotationMap
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*/
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bool useRotationMap() const;
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/**
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* Returns the mode used to align the picture to a map's North.
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* @see setNorthMode()
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* @see northOffset()
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* @note added in QGIS 2.18
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*/
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NorthMode northMode() const;
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/**
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* Sets the mode used to align the picture to a map's North.
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* @see northMode()
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* @see setNorthOffset()
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* @note added in QGIS 2.18
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*/
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void setNorthMode( NorthMode mode );
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/**
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* Returns the offset added to the picture's rotation from a map's North.
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* @see setNorthOffset()
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* @see northMode()
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* @note added in QGIS 2.18
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*/
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double northOffset() const;
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/**
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* Sets the offset added to the picture's rotation from a map's North.
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* @see northOffset()
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* @see setNorthMode()
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* @note added in QGIS 2.18
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*/
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void setNorthOffset( double offset );
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/** Returns the resize mode used for drawing the picture within the composer
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* item's frame.
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* @returns resize mode of picture
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* @note added in 2.3
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* @see setResizeMode
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*/
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ResizeMode resizeMode() const;
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/** Sets the picture's anchor point, which controls how it is placed
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* within the picture item's frame.
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* @param anchor anchor point for picture
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* @note added in 2.3
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* @see pictureAnchor
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*/
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void setPictureAnchor( QgsComposerItem::ItemPositionMode anchor );
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/** Returns the picture's current anchor, which controls how it is placed
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* within the picture item's frame.
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* @returns anchor point for picture
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* @note added in 2.3
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* @see setPictureAnchor
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*/
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ItemPositionMode pictureAnchor() const;
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/** Returns the fill color used for parametrized SVG files.
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* @see setSvgFillColor()
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* @see svgStrokeColor()
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* @note added in QGIS 2.14.1
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*/
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QColor svgFillColor() const;
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/** Sets the fill color used for parametrized SVG files.
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* @param color fill color.
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* @note this setting only has an effect on parametrized SVG files, and is ignored for
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* non-parametrized SVG files.
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* @see svgFillColor()
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* @see setSvgStrokeColor()
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* @note added in QGIS 2.14.1
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*/
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void setSvgFillColor( const QColor &color );
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/** Returns the stroke color used for parametrized SVG files.
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* @see setSvgStrokeColor()
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* @see svgFillColor()
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* @note added in QGIS 2.14.1
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*/
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QColor svgStrokeColor() const;
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/** Sets the stroke color used for parametrized SVG files.
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* @param color stroke color.
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* @note this setting only has an effect on parametrized SVG files, and is ignored for
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* non-parametrized SVG files.
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* @see svgStrokelColor()
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* @see setSvgFillColor()
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* @note added in QGIS 2.14.1
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*/
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void setSvgStrokeColor( const QColor &color );
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/** Returns the stroke width (in mm) used for parametrized SVG files.
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* @see setSvgStrokeWidth()
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* @see svgStrokeColor()
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* @note added in QGIS 2.14.1
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*/
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double svgStrokeWidth() const;
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/** Sets the stroke width used for parametrized SVG files.
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* @param width stroke width in mm
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* @note this setting only has an effect on parametrized SVG files, and is ignored for
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* non-parametrized SVG files.
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* @see svgStrokeWidth()
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* @see setSvgStrokeColor()
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* @note added in QGIS 2.14.1
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*/
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void setSvgStrokeWidth( double width );
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/** Returns the current picture mode (image format).
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* @returns picture mode
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* @note added in 2.3
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*/
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Mode mode() const;
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public slots:
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/** Sets the picture rotation within the item bounds. This does not affect
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* the item's frame, only the way the picture is drawn within the item.
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* @param r rotation in degrees clockwise
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* @see pictureRotation
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* @note added in 2.2
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*/
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virtual void setPictureRotation( double r );
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/** Sets the resize mode used for drawing the picture within the item bounds.
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* @param mode ResizeMode to use for image file
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* @note added in 2.3
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* @see resizeMode
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*/
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virtual void setResizeMode( ResizeMode mode );
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/** Recalculates the source image (if using an expression for picture's source)
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* and reloads and redraws the picture.
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* @param context expression context for evaluating data defined picture sources
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* @note added in 2.3
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*/
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void refreshPicture( const QgsExpressionContext *context = 0 );
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/** Forces a recalculation of the picture's frame size
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* @note added in 2.3
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*/
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void recalculateSize();
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virtual void refreshDataDefinedProperty( const QgsComposerObject::DataDefinedProperty property = QgsComposerObject::AllProperties, const QgsExpressionContext *context = 0 );
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signals:
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/** Is emitted on picture rotation change*/
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void pictureRotationChanged( double newRotation );
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};
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